It would appear that the Collections subcategories on the Tower Vendors page no longer display the full lists of available shaders, emblems, emotes by source (release, vendor, activity, etc). Instead only the initial "Common" items appear to be displayed. This makes it very difficult for those who like to keep track of our collection status to obtain this information outside of the game proper.
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Should have screen shot my collection prior to the update. Here's hoping for a restore.